<body>
  <div id="app">
    <input type="text" v-model="school.name">
    <div>{{school.name}} {{school.age}}</div>
  </div>
</body>

<!-- <script type="module" src="./vue.js"></script> -->
<script type="module">
  import {Vue} from './vue.js'
  let vm = new Vue({
    el: '#app',
    data: {
      school: {
        name: 'GDUT',
        age: 123
      }
    }
  });

  setTimeout(() => {
    vm.school.name = 'GDUT_MODIFY'
    console.log(vm)
  }, 1000)

</script>